"Thank you and welcome!"
Translation:Kirimvose se jiōrna!
Note that "kirimvose" is the instrumental case of "kirimves" ("joy", solar noun).
In this sentence se means and, but in other sentences they conjugate the second noun to indicate and, like "kepa abrā issi"
If you're listing things the last noun that you list has a long vowel at the end (and some other changes sometimes according to some things that I've read). This is not the same as the sentence you provided -- this is more of a greeting. Make sense?
Sorry for the late reply.
Se is used to conjoin clauses; conjunctive lengthening is used to conjoin nouns or adjectives.
Se is used as a conjunction between two phrases where as the elongated inflection such as in "taobii" denotes additional subjects/objects (people/things).